Machine for cored building blocks of plastic material



May 19, 1925.

- GAG. DEBAY MACHINE FORGOHED BUILDING BLOCKS OF PLASTIC MATERIAL 2 Sheets-sneak 1 Filed March 20, 1922 May 19,1925. 1,538,425 G. C. DEBAY MACHINE FOR GoREp BUILDING BLOCKS OF PLASTIC MATERIAL Filed March 20, 1922 2 Sheets-Sheet 2 FIG. 2

INVENT V and I do hereby Patented May 19,

ENT' OFFICE.

GEORGE o. DEBAVY, or SPRINGDALE, PENNSYLVANIA.

MACHINE FOR CORED BUILDING B LOOKS O1 PLASTIC MATERIAL.

Applieation filed March 20, 1922. Serial No. 545,163;

To all whom it 17mg} cmwem:

Be it known that I; Gnonon 0.:DEBAY, a citizen of theUnited States, and resident of Springdale, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Machines for Cored Building Blocks of Plastic hflaterial; declare the. following to he a full, clear and exact description thereof.

My invention relates to machines formal;- ingxcored or solid building blocks of plasic material. a 1

In Letters Patent of the United. States. No. 1,362,928,,granted to me on the 21st day Off December, -1S )20,I have illustrated and described machine of this character,

and the object of't-he-present invention is to provide for the moreeflicient filling of the molds and compacting the material therein to obtain a dense compact block which will be strong and durable and stand up against the compression strains to which such blocks are subjected when in use.

In the accompanying drawings, F ig. l is a longitudinal section of a machine similar to that described in said Letters; Patent,

showing my invention applied thereto; and

Fig. 2 is an enlarged cross section on the line 2-2, Fig.1.

In the drawings the numeral 2 designates a shaft mounted in suitable hearings in the frame said shaft, being. driven through.

gearing hereinafter described. Thegshaft 3 is mounted in suitable hearings. in the frame, and said shaft is parallel with the shaft 2 and; in line therewith An endless convey-er or chain 4 travels on the sprocketswheels 5' and 6, mounted on the shafts 2 and respectively Secured to the endless chain 4 are they mold-members 7 which form the bottom 8; and one of the. sides 9 of the mold. The mold ineinbers are so mounted on the endless chain 4 as: to have the. necessary flexibility in passing around the wheels. 5 and 6., as indicated in L- The side-plate 9 of each mold-member 7 has the upper portion made. in'two sections 10 and 11 hinged as at 12, so as to be free to. swing vertically. The side portion 9: and the swinging sections 10 and. ll are cut away to; form in conjunction with each other the openings; 13:. c

(lore-bars 14; are connected to the rods 15 secured in the cross-her 16, and said core bars pass through the openings 13 in the mold-members as clearly indicated. in

toslide up and This gate 1S preferably made in sections 1, the number or" said core-bars correspond-- ing'to the number of openings 13. These core hars vary in cross-sectional area, hav-' ing the thin or attenuated portions 14- and the full sized portions 1% which fitsnugly within the openings 13 of the mold menihers, the increase in cross-sectional area of said core-bars being gradual. i

Guides lTare provided for engaging the swinging sections 10 and 11 of the moldn'ie nbersto swing" them over in position to enclose the core-bars, all as described and illustrated in the above recited Letters Patent.

A hopper 8 is provided, to which the material from which the blocks are to he made delivered. This hopper issupported or. a frame above the molds as they travel fcrward, and said hopper is of suilicient size so that it will be delivering material to two or more of the molds at one time; i As the molds reach the hopper 18' the attenuates portions 14 of the core-bars are in said molds, and this permits a greaterquantity of the material to enter the mold than would he the. case were the core-bar the full size at this point. p v The ends of the molds are formed by the plates 19 which form pant'oi the stationary frame.

The hopper is provided with the opening 20, the controlled by the gate 21 at its rear portion size of which is which is adapted down in suitable guides 22.

a, Z) and cythe nuniherof sections depend-- ing upon the size of the block. To provide for the independent operation of each section, a screw-rod23 is journaled to: the upper endot each gatesection, said screwrod having threaded engagement with a Worm gear 24': mounted in the hoppeu frame 26. By turning the screwrods 23 it will be ipparent that the sections a. Z) and 6 may he raised' or lowered, if desired. and where it is desired to lower orraise all the sections siimiltaneously, I provide the worm-shaft QThaving the worms 28 which engage the worm-gears 24: on the screwrods 23; The rods 23 have the locking pins 23 which are adapted to hold the rod-s from turning when the gates are operated tl irough the worni drive. The worm-shaft '97 is provided with the hand-wheel :27".

An auxiliary material-feeding device.

a. ass r25 aroll is employed said roll is mounted on a shaft 31 which is journaled in suitable bearings 82 in the frame. The roll 30 is contained within the chamber 5O formed with the curved wall 3O conforming generally to the circumference of said roll, so that any surplus material not required in the formation of the block, as will more fully appear, is carried up and delivered at the front of the roll to be again picked up or carried forward by said roll.

The roll 30 has the roughened or corrugated portions 33 on its circumference, and between said corrugated portions are the depressions 34-. The roll 30 is driven by a suitable train of gears from the power shaft- 2, as clearly illustrated in Fig. 2, the section being taken on the line 2 2 of Fig. l. Shaft 2 is driven by a motor or other power source not shown, and drives through worm 35 and worm wheel 36 a shaft 37 which has two gear teeth 38, which drives a train of gears to the roll 30, said gears being indicated by the numerals 39, 4:0 and ll, gear 41 being secured to the roll shaft 31. The gear teeth 38 on shaft 37 also drive a gear d2 on the shaft 43, said shaft having the gear 44: which drives through gears 4:5 and 46 the sprocket shaft 2.

A trowel-plate 47 is provided for leveling off and smoothing up the upper face of the block, as it passes from under the roll 30.

In the operation of the machine, the material from which the blocks are to be formed is introduced into the hopper 18, and is discharged therefrom into the molds as they come under the hopper, the attenuated portions 14: of the core-bars being at the point where the material is first introduced into the molds, thereby permitting a greater quantity of material to enter the mold. The material completely fills the mold, and as the mold moves along the cross-sectional area of the core-bars gradually increases and the material is compactcc by the action of said core-bars.

The gate 21 is adjusted to allow a certain quantity of material to pass through into position to be taken up or advanced by the roll 30 which is revolving in the direction of the arrow, 1. The corrugated portions 33 pick up or advance the material and deposit it on top of the material already in the mold, adding a certain amount there to, and the action of the roll further tending to compact the material as it is delivered by said roll. The roll 30 is preferably driven at a higher rate of speed than the travel of the endless-conveyor l, so that the material will be advanced to supply the forward portion of the mold with the additional material to insure that part of the block being as compact as the remaining portions. The depressions or recessed portions 3d of the roll coincide with the sides of the mold and are timed to meet the upper edges of the sides of the molds as they come around, so as not to cause interference. Any surplus not needed to make up the block is carried around by the roll and deposited in front of same to be again advanced as before.

in this manner 1 provide for the additions material to the material already entering the mold front the hopper directly, and supply any deficiency which there may be which mauld result in the block not being properly compacted or of sufficient density. The amount of material which is supplied by the roll may be varied by the adjustment 0" he gate 2i, or the material deiivcred to diii'erent portions of the block may be var'ed by adjusting any one of the sections a, i) and 0 of the gate.

Ti hile l have illustrated and described my invention in connection with the makof cored or hollow building blocks, it is apparent that b Y ispensing with the core bar and providing imperforated side plates the machine is applicable for the making sol d blocks or bricks.

By the to ro iened as used in the claims, 1 means any form of unevenness on the periphery of said roll which will advance additional material onto the material previously introduced into the mold, although the broad claims are intended to cover any means of doing this.

What I claim is:

1. In a machine for making cored blocks of plastic material, the combination of a mold having openings in its walls, a corebar extending through said openings, means for iioving said mold, a hopper above said mold, and communicating therewith, said hopper having an opening at its lower end, a gate controlling said opening, and a device beyond said gate adapted to feed additional material to said mold.

2. In a machine for making cored blocks of plastic material, the combination of a mold having openings in its walls, a corebar extendin g through said openings, means for moving said mold, a hopper above said mold, and communicating therewith, said hopper having an opening at its lower end, a gate controlling said opening, and a roll beyond said gate having roughened portions and means for rotating on its periphery, said roll.

In a machine for making cored blocks of plastic material, the combination of a mold havingopenings in its walls, a corehar extending through said openings, means for moving said mold, a hopper above said mold and communicating therewith, said hopper having an opening at the lower end thereof, a gate composed of sections controlling said opening, means for raising and lowering said sections independent of each lit) other, and a device beyondsaid gate for feeding additional material to said mold.

4. In a machine for making cored blocks of plastic material, the combination of a mold having openings in its walls,a core-bar extending into said openings, means for moving said mold, means for delivering the bulk of the material to said mold, a roll be yond said first feeding means, and a ma terial storage chamber for; confining said roll, said rollhaving a roughened portion on its periphery and adapted to carry surplus material into said chamber. Y

5. In a machine for making cored blocks of plastic material, the combination of a mold having openings in its Walls, a corebar extending into said openings, means for moving said mold, means fo'r delivering material to said mold, a roll beyond said first feeding means having roughened portions on its periphery, and a recessed portion formed between said roughened portions.

6; In a machine for making cored'blocks of plastic material, the combination of a mold having openings in its walls, a corebar extending intosaid openings, means for moving said mold, means for deliverlng materialto said mold, a device beyond said first feeding means for feeding additional material to said mold, and a trowel-plate beyond said roll.

7. In a machine for making cored blocks of plastic material, the combination of a mold having openings in its walls, a corebar extending into said openings, means for moving said mold, means for delivering material to said mold, a roll beyond said first with respect to said bar, and means for feeding material into said mold at a point intermediate the ends ofthe core bar, said core-bar having portions adjacent the said feeding means tapering from each'end toward said point. e

9. In a machine for forming blocks of plastic material, the combination of a mold having openings in its walls, a core bar adapted to extend through one of said openings and having areduced portion within said mold, means for moving said mold lengthwise with respect to said bar and toward the thicker portion thereof, and means for feeding material to said mold at a point adjacent to the reduced portion of said bar. In testimony whereof, I, the said GEORGE C. DEBAY, have hereunto set my hand.

GEORGE C. DEBAY. \Vitnessesi' g 1 J 01m F. WILL, HENRY HoLz. 

